Chip structure and plate heat exchanger

Abstract

This application relates to a chip structure and a plate heat exchanger. The chip structure includes a base plate, a side flange, a partition rib, and a sealing expansion portion. The side flange is fixedly connected to the outer periphery of the base plate. The sealing expansion portion is disposed on one side of the chip structure and fixedly connected between the base plate and the side flange. One end of the partition rib is fixedly connected to the sealing expansion portion, and the other end extends along a predetermined direction of the chip structure. The connection length between the sealing expansion portion and the base plate, as well as the side flange, along the direction perpendicular to the predetermined direction, is greater than the connection length between the partition rib and the base plate along the same direction. The top surface of the partition rib and the top surface of the sealing expansion portion are respectively welded to the outer bottom surface of the base plate of the adjacent chip structure. The welding length of the sealing expansion portion along the direction perpendicular to the predetermined direction is greater than the welding length of the partition rib along the same direction. The chip structure and plate heat exchanger provided by this application solve the problem of a high probability of coolant leakage at the weld between the partition rib and the transition fillet.

Description

Technical Field

[0001] This application relates to the field of heat exchange device technology, and in particular to a chip structure and plate heat exchanger. Background Technology

[0002] Existing plate heat exchangers with stacked structures are typically formed by stacking multiple chips. Each chip includes a horizontally positioned base plate and flanges surrounding the base plate. Furthermore, due to manufacturing processes, there are transition fillets between the base plate and the flanges. Further, as... Figure 1 As shown, in order to extend the flow channel length between adjacent chips, some plate heat exchangers use a partition rib in the middle of the chip. One end of the partition rib is welded to one side of the chip, and the other end extends toward the other side of the chip but leaves a gap between it and the chip's flange, so that the space between adjacent chips is divided into a U-shaped flow channel by the partition rib.

[0003] However, due to the presence of the transition fillet between the base plate and the flange, it is difficult to achieve a complete fit between the partition rib and the transition fillet. Even the solder cannot guarantee that the gap between the partition rib and the transition fillet can be completely sealed. In other words, the probability of coolant leakage at the weld between the partition rib and the transition fillet is relatively high, which can easily cause coolant cross-flow between the inlet and outlet ends, thereby reducing the heat exchange effect of the plate heat exchanger. Utility Model Content

[0004] Therefore, it is necessary to provide a chip structure and plate heat exchanger to solve the problem of high probability of coolant leakage at the welding joint between the existing partition ribs and transition fillets.

[0005] The chip structure provided in this application includes a base plate, a side flange, a partition rib, and a sealing expansion portion. The side flange is fixedly connected to the outer periphery of the base plate. The sealing expansion portion is disposed on one side of the chip structure and fixedly connected between the base plate and the side flange. One end of the partition rib is fixedly connected to the sealing expansion portion, and the other end extends along a predetermined direction of the chip structure. The connection length between the sealing expansion portion and the base plate along the predetermined direction is greater than the connection length between the partition rib and the base plate along the predetermined direction. The connection length between the sealing expansion portion and the side flange along the predetermined direction is greater than the connection length between the partition rib and the base plate along the predetermined direction. The top surface of the partition rib and the top surface of the sealing expansion portion are respectively welded to the outer bottom surface of the base plate of the adjacent chip structure. The welding length of the sealing expansion portion along the predetermined direction is greater than the welding length of the partition rib along the predetermined direction.

[0006] In one embodiment, the sealing enlargement protrudes from both ends of the dividing rib perpendicular to the preset direction.

[0007] In one embodiment, the connection between the base plate and the side flange has a chamfered structure, and the sealing enlargement has a first side surface, a transition surface and a second side surface that are sequentially adjacent to each other. The first side surface is welded to the inner wall of the side flange, the transition surface is welded to the inner wall of the chamfered structure, and the second side surface is welded to the inner wall of the base plate.

[0008] In one embodiment, the sealing enlargement and the partition rib are integrally formed; or, the sealing enlargement and the partition rib are welded together. And / or, the sealing enlargement, the base plate, and the side flange are integrally formed; or, the sealing enlargement is welded to the base plate and the side flange respectively.

[0009] In one embodiment, the preset direction is the length direction of the chip structure, the sealing expansion portion includes a first linear sealing strip, the first linear sealing strip extends along the width direction of the chip structure, the extension length of the first linear sealing strip is less than the width of the chip structure, and the partition rib is sealed to the first linear sealing strip.

[0010] In one embodiment, the preset direction is the length direction of the chip structure. The sealing expansion portion includes a first bent sealing strip, a second bent sealing strip, and a second linear sealing strip. The second linear sealing strip extends along the width direction of the chip structure. One end of the first bent sealing strip is connected to the second linear sealing strip, and the other end extends along the extension direction of the side flange to the long side of the chip structure. One end of the second bent sealing strip is connected to the second linear sealing strip, and the other end extends along the extension direction of the side flange to the long side of the chip structure. The first bent sealing strip and the second bent sealing strip are distributed on both sides of the second linear sealing strip along the width direction of the chip structure. The separating rib is sealed and connected to the second linear sealing strip.

[0011] In one embodiment, the first bent sealing strip, the second linear sealing strip, and the second bent sealing strip are integrally formed.

[0012] In one embodiment, the side flange and the bottom plate together form a flow groove. The end of the dividing rib away from the sealing expansion and the corresponding side flange are spaced apart to form an interval opening, so as to divide the flow groove into a meandering flow channel. The bottom plate is provided with an inlet and an outlet that are respectively connected to the flow channel. The inlet and outlet are both located at the end of the flow groove away from the interval opening, and the inlet and outlet are distributed on both sides of the dividing rib.

[0013] In one embodiment, the sealing expansion portion includes a sealing plate, which is sealed and filled at one end of the flow channel near the inlet and outlet. The sealing plate has a first notch and a second notch, the first notch covering part of the inlet and the second notch covering part of the outlet. A partition rib is sealed and connected to one end of the sealing plate near the spacer opening.

[0014] This application also provides a plate heat exchanger, which includes the chip structure of any of the above embodiments. Multiple chip structures are stacked and welded to form the plate heat exchanger. Furthermore, adjacent chip structures are arranged to form a flow channel, and each flow channel has one or more partition ribs inside, which can divide the flow channel to form multiple heat exchange zones.

[0015] Compared with existing technologies, the chip structure and plate heat exchanger provided in this application have a longer connection length between the sealing expansion portion and the base plate along a predetermined direction than the connection length between the partition rib and the base plate along a predetermined direction, and a longer connection length between the sealing expansion portion and the side flange along a predetermined direction than the connection length between the partition rib and the base plate along a predetermined direction. When the adjacent sides of the sealing expansion portion are welded to the base plate and the side flange respectively, on the one hand, the welding area is increased, improving the sealing effect. That is, the welding area between the sealing expansion portion and the base plate and the side flange is larger, reducing the risk of leakage. Furthermore, the connection between the sealing expansion portion and the partition rib is also more robust, improving the stability of the overall structure. On the other hand, the sealing expansion portion increases the flow resistance when coolant leaks, thus effectively preventing the leakage from escalating. When the sealing expansion portion, the base plate, and the side flange are integrally formed, the probability of leakage at the connection of the sealing expansion portion will also be greatly reduced, or even impossible.

[0016] Furthermore, the welding length of the sealing expansion section along the predetermined direction is greater than the welding length of the separating rib along the predetermined direction. This design, on the one hand, increases the welding area and improves the sealing effect; that is, the welding area between the top surface of the sealing expansion section and the outer bottom surface of the substrate of the adjacent chip structure is larger, reducing the probability of leakage between adjacent chip structures. On the other hand, the sealing expansion section increases the flow resistance when coolant leaks, which can also effectively prevent the leakage from escalating. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an existing chip structure;

[0019] Figure 2 A partial cross-sectional view of a chip structure according to an embodiment provided in this application;

[0020] Figure 3 This is a schematic diagram of the chip structure of Embodiment 1 provided in this application;

[0021] Figure 4 This is a schematic diagram of the chip structure of Embodiment 2 provided in this application;

[0022] Figure 5 This is a schematic diagram of the chip structure of Embodiment 3 provided in this application.

[0023] Reference numerals: 100, base plate; 110, inlet; 120, outlet; 200, side flange; 210, flow groove; 211, flow channel; 220, chamfered structure; 300, partition rib; 310, spacer opening; 400, sealing enlargement; 410, first side surface; 420, second side surface; 430, transition surface; 440, first linear sealing strip; 450, first bent sealing strip; 460, second bent sealing strip; 470, second linear sealing strip; 480, sealing plate; 481, first notch; 482, second notch. Detailed Implementation

[0024] Please see Figures 2-5In one embodiment, the plate heat exchanger is formed by stacking and welding multiple chip structures. At least a portion of the chip structures includes a base plate 100, side flanges 200, separating ribs 300, and a sealing enlargement 400. The base plate 100 is made of a high thermal conductivity metal material, such as aluminum alloy or copper alloy, and its surface is flattened to ensure good contact with other components. The side flanges 200 are integrally formed with the base plate 100 by a stamping process. The side flanges 200 are fixedly connected to the outer periphery of the base plate 100 and together with the base plate 100 form a flow channel 210 for containing coolant (or refrigerant). The height of the side flanges 200 is designed according to actual needs to meet the space requirements for coolant flow. The sealing expansion portion 400 is disposed on one side of the chip structure and welded between the base plate 100 and the side flange 200. That is, the two adjacent sides of the sealing expansion portion 400 are welded to the base plate 100 and the side flange 200, respectively. Specifically, the sealing expansion portion 400 is connected to the base plate 100 and the side flange 200 by high-precision welding processes such as laser welding or electron beam welding to ensure the density and strength of the weld. Alternatively, the sealing expansion portion 400, the base plate 100, and the side flange 200 are integrally formed. Specifically, the base plate 100 is stamped to form the sealing expansion portion 400, or the sealing expansion portion 400, the base plate 100, and the side flange 200 are integrally cast. One end of the partition rib 300 is welded to (or integrally formed with) the sealing expansion portion 400, and the other end extends a predetermined distance towards the opposite side of the sealing expansion portion 400 along a predetermined direction of the chip structure (which may be the length direction, the width direction, or other directions). It should be noted that in the plate heat exchanger, each flow channel 210 has one or more dividing ribs 300 inside. The dividing ribs 300 can divide the flow channel 210 into multiple heat exchange zones, so that the plate heat exchanger can integrate multiple functions such as evaporator, condenser, subcooler and intermediate heat exchanger. Adjacent heat exchange zones can be isolated or connected.

[0025] Furthermore, the connection length between the sealing expansion portion 400 and the base plate 100 along a direction perpendicular to the preset direction is greater than the connection length between the partition rib 300 and the base plate 100 along a direction perpendicular to the preset direction, and the connection length between the sealing expansion portion 400 and the side flange 200 along a direction perpendicular to the preset direction is also greater than the connection length between the partition rib 300 and the base plate 100 along a direction perpendicular to the preset direction. When the adjacent sides of the sealing expansion portion 400 are welded to the base plate 100 and the side flange 200 respectively, on the one hand, the welding area is increased, improving the sealing effect. That is, the welding area between the sealing expansion portion 400 and the base plate 100 and the side flange 200 is larger, reducing the risk of leakage. In addition, the connection between the sealing expansion portion 400 and the partition rib 300 is also more secure, improving the stability of the overall structure. On the other hand, the sealing expansion portion 400 increases the flow resistance when coolant leaks, thereby effectively preventing the leakage from escalating. When the sealing expansion portion 400, the base plate 100 and the side flange 200 are integrally formed, the probability of leakage at the connection of the sealing expansion portion 400 will be greatly reduced, or even impossible.

[0026] Furthermore, the end of the dividing rib 300 away from the sealing enlargement 400 and the side flange 200 are spaced apart to form a gap opening 310, thereby dividing the flow groove 210 into a meandering flow channel 211. The base plate 100 is provided with an inlet 110 and an outlet 120 respectively connected to the flow channel 211. The inlet 110 and the outlet 120 are both located at the end of the flow groove 210 away from the gap opening 310, and the inlet 110 and the outlet 120 are distributed on both sides of the dividing rib 300, so that the coolant sequentially passes through the inlet 110, one side of the flow channel 211, the gap opening 310 and the other side of the flow channel 211 and enters the outlet 120.

[0027] Furthermore, the top surfaces of the partition rib 300 and the sealing expansion 400 are respectively welded to the outer bottom surface of the base plate 100 of the adjacent chip structure. The welding length of the sealing expansion 400 along a predetermined direction (that is, the length of the welding area of ​​the sealing expansion 400 welded to the base plate 100 and the side flange 200 along a predetermined direction) is greater than the welding length of the partition rib 300 along a predetermined direction. For example, if the width of the partition rib 300 is 10 mm, the welding length of the sealing expansion 400 can be designed to be 100 mm. This design ensures that the sealing expansion 400 can cover a large amount of the transition rounded corner area between the base plate 100 and the side flange 200, providing a larger welding area.

[0028] By setting the sealing expansion portion 400 to weld adjacent chip structures, on the one hand, the welding area is increased and the sealing effect is improved. That is, the welding area between the top surface of the sealing expansion portion 400 and the outer bottom surface of the base plate 100 of the adjacent chip structure is larger, which reduces the probability of leakage between adjacent chip structures. On the other hand, the sealing expansion portion 400 increases the flow resistance when coolant leaks, which can also effectively prevent the leakage from expanding.

[0029] Specifically, in one embodiment, such as Figure 2 As shown, the connection between the base plate 100 and the side flange 200 has a chamfer structure 220, which is an arc or other arc shape. The sealing enlargement 400 is provided with a first side surface 410, a transition surface 430 and a second side surface 420 that are adjacent to each other in sequence. The first side surface 410 is welded to the inner wall of the side flange 200, the transition surface 430 is welded to the inner wall of the chamfer structure 220 and the second side surface 420 is welded to the inner wall of the base plate 100.

[0030] In one embodiment, the sealing expansion portion 400 protrudes from both ends of the partition rib 300 perpendicular to the preset direction. That is, the partition rib 300 is connected to the middle region of the sealing expansion portion 400 perpendicular to the preset direction. For example, when the preset direction is the length direction of the chip structure, the direction perpendicular to the preset direction is the width direction of the chip structure. In this case, the sealing expansion portion 400 extends along the width direction, and one end of the partition rib 300 is located in the center region of the wide side of the chip structure.

[0031] However, this is not the only embodiment. In other embodiments, the sealing enlargement 400 may have one end protruding from the end of the partition rib 300 along a predetermined direction, and the other end of the sealing enlargement 400 may be flush with the partition rib 300.

[0032] In one embodiment, the sealing expansion portion 400 and the partition rib 300 are integrally formed. Specifically, the integral forming is achieved by integral processing to form a seamless continuous structure between the sealing expansion portion 400 and the partition rib 300. The two can be integrally cast, 3D printed, or machined.

[0033] However, not limited to this, in another embodiment, the sealing enlargement 400 and the partition rib 300 can also be welded, wherein the welding formwork connects the contact surfaces of the sealing enlargement 400 and the partition rib 300 by molten solder.

[0034] Both methods eliminate potential gaps at the connection interface. One-piece molding is suitable for manufacturing scenarios using a single material, while welding molding is suitable for manufacturing scenarios using dissimilar materials or in separate parts. For example, one-piece molding can use a stamping process to form an aluminum plate into a composite structure including a sealing enlargement 400 and a partition rib 300 in one step, while welding molding can use laser welding to weld the prefabricated partition rib 300 to the surface of the sealing enlargement 400.

[0035] Example 1

[0036] In this embodiment, as Figure 3 As shown, the preset direction is the length direction of the chip structure. The sealing expansion portion 400 includes a first linear sealing strip 440. The first linear sealing strip 440 extends along the width direction of the chip structure, and the extension length of the first linear sealing strip 440 is less than the width of the chip structure. The partition rib 300 is sealed to the first linear sealing strip 440.

[0037] Specifically, the first linear sealing strip 440 extends along its width to form a transverse sealing band, and its extension length is less than the width of the chip structure, thus maintaining a gap between the two ends of the first linear sealing strip 440 and the two long sides of the chip structure. The separating rib 300 extends along its length from the middle of the first linear sealing strip 440, forming a longitudinal separating structure. A T-shaped connection node is formed at the intersection of the first linear sealing strip 440 and the separating rib 300, and the welding area at this node is enlarged due to the width extension of the first linear sealing strip 440. When the coolant flows through the flow channel 210, the first linear sealing strip 440 prevents the coolant from penetrating along its width into the gap between the separating rib 300 and the transition fillet.

[0038] Example 2

[0039] In this embodiment, as Figure 4 As shown, the preset direction is the length direction of the chip structure. The sealing expansion portion 400 includes a first bent sealing strip 450, a second bent sealing strip 460, and a second linear sealing strip 470. The second linear sealing strip 470 extends along the width direction of the chip structure. One end of the first bent sealing strip 450 is connected to the second linear sealing strip 470, and the other end extends along the extension direction of the side flange 200 to the long side of the chip structure. One end of the second bent sealing strip 460 is connected to the second linear sealing strip 470, and the other end extends along the extension direction of the side flange 200 to the long side of the chip structure. The first bent sealing strip 450 and the second bent sealing strip 460 are distributed on both sides of the second linear sealing strip 470 along the width direction of the chip structure. The partition rib 300 is sealed and connected to the second linear sealing strip 470. The first bent sealing strip 450, the second bent sealing strip 460, and the second linear sealing strip 470 are connected to form a U-shaped structure. The sealing expansion portion 400 and the partition rib 300 together constitute an approximately trident-like structure.

[0040] Specifically, when the second linear sealing strip 470 extends along the width direction, its two ends are connected to the first bent sealing strip 450 and the second bent sealing strip 460, respectively. The bent sealing strips extend along the extension direction of the side flange 200 to the long side, so that the sealing enlargement 400 forms a continuous sealing interface in both the width and length directions. When the coolant flows through the flow channel 210, the second linear sealing strip 470 blocks the leakage path in the width direction, and the first bent sealing strip 450 and the second bent sealing strip 460 block the leakage path in the length direction, forming a multi-directional sealing barrier.

[0041] Furthermore, in one embodiment, the first bent sealing strip 450, the second linear sealing strip 470, and the second bent sealing strip 460 are integrally formed.

[0042] However, this is not the only embodiment. In other embodiments, the first bent sealing strip 450, the second linear sealing strip 470, and the second bent sealing strip 460 may also be welded.

[0043] Example 3

[0044] In this embodiment, as Figure 5 As shown, the sealing expansion portion 400 includes a sealing plate 480, which is sealed and filled at one end of the flow channel 210 near the inlet 110 and the outlet 120. The sealing plate 480 is provided with a first notch 481 and a second notch 482. The first notch 481 covers part of the inlet 110 and the second notch 482 covers part of the outlet 120. The partition rib 300 is sealed and connected to one end of the sealing plate 480 near the spacer 310.

[0045] It should be noted that the sealing plate 480 is recommended not to be positioned beyond the central axis of the inlet 110 and outlet 120 to prevent the sealing plate 480 from affecting the flow area of ​​the coolant.

[0046] This design further increases the welding area, greatly reducing the probability of coolant crossflow.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

[0049] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A chip structure, characterized in that, The chip structure includes a base plate (100), a side flange (200), a partition rib (300), and a sealing expansion portion (400). The side flange (200) is fixedly connected to the outer periphery of the base plate (100). The sealing expansion portion (400) is disposed on one side of the chip structure and fixedly connected between the base plate (100) and the side flange (200). One end of the partition rib (300) is fixedly connected to the sealing expansion portion (400), and the other end extends along a preset direction of the chip structure. Furthermore, the connection length between the sealing expansion portion (400) and the base plate (100) along a direction perpendicular to the preset direction is greater than the connection length between the partition rib (300) and the base plate (100) along a direction perpendicular to the preset direction. The top surface of the separating rib (300) and the top surface of the sealing enlargement (400) are respectively welded to the outer bottom surface of the base plate (100) of the adjacent chip structure, and the welding length of the sealing enlargement (400) along the direction perpendicular to the preset direction is greater than the welding length of the separating rib (300) along the direction perpendicular to the preset direction.

2. The chip structure according to claim 1, characterized in that, The sealing enlargement (400) protrudes from both ends of the separator rib (300) along the two ends perpendicular to the preset direction.

3. The chip structure according to claim 1, characterized in that, The connection between the base plate (100) and the side flange (200) has a chamfered structure (220). The sealing enlargement (400) is provided with a first side surface (410), a transition surface (430), and a second side surface (420) that are adjacent to each other in sequence. The first side surface (410) is welded to the inner wall of the side flange (200), the transition surface (430) is welded to the inner wall of the chamfered structure (220), and the second side surface (420) is welded to the inner wall of the base plate (100).

4. The chip structure according to claim 1, characterized in that, The sealing enlargement (400) and the partition rib (300) are integrally formed; or, the sealing enlargement (400) and the partition rib (300) are welded together. And / or, the sealing enlargement (400), the base plate (100) and the side flange (200) are integrally formed; or, the sealing enlargement (400) is welded to the base plate (100) and the side flange (200) respectively.

5. The chip structure according to claim 1, characterized in that, The preset direction is the length direction of the chip structure. The sealing expansion part (400) includes a first linear sealing strip (440). The first linear sealing strip (440) extends along the width direction of the chip structure. The extension length of the first linear sealing strip (440) is less than the width of the chip structure. The partition rib (300) is sealed to the first linear sealing strip (440).

6. The chip structure according to claim 1, characterized in that, The preset direction is the length direction of the chip structure. The sealing expansion part (400) includes a first bent sealing strip (450), a second bent sealing strip (460), and a second linear sealing strip (470). The second linear sealing strip (470) extends along the width direction of the chip structure. One end of the first bent sealing strip (450) is connected to the second linear sealing strip (470), and the other end extends along the extension direction of the side flange (200) to the long side of the chip structure. One end of the second bent sealing strip (460) is connected to the second linear sealing strip (470), and the other end extends along the extension direction of the side flange (200) to the long side of the chip structure. The first bent sealing strip (450) and the second bent sealing strip (460) are distributed on both sides of the second linear sealing strip (470) along the width direction of the chip structure. The separating rib (300) is sealed and connected to the second linear sealing strip (470).

7. The chip structure according to claim 6, characterized in that, The first bent sealing strip (450), the second linear sealing strip (470) and the second bent sealing strip (460) are integrally formed.

8. The chip structure according to claim 1, characterized in that, The side flange (200) and the base plate (100) together form a flow groove (210). The dividing rib (300) is provided with an interval opening (310) at one end away from the sealing expansion part (400) and the corresponding side flange (200) to divide the flow groove (210) into a meandering flow channel (211). The base plate (100) is provided with an inlet (110) and an outlet (120) that are respectively connected to the flow channel (211). The inlet (110) and the outlet (120) are both provided at one end of the flow groove (210) away from the interval opening (310). The inlet (110) and the outlet (120) are distributed on both sides of the dividing rib (300).

9. The chip structure according to claim 8, characterized in that, The sealing expansion section (400) includes a sealing plate (480), which is sealed and filled at one end of the flow channel (210) near the inlet (110) and the outlet (120). The sealing plate (480) is provided with a first notch (481) and a second notch (482). The first notch (481) covers part of the inlet (110), and the second notch (482) covers part of the outlet (120). The partition rib (300) is sealed and connected to one end of the sealing plate (480) near the spacer (310).

10. A plate heat exchanger, characterized in that, The device includes the chip structure described in any one of claims 1 to 9, wherein multiple chip structures are stacked and welded to form the plate heat exchanger, and adjacent chip structures are arranged to form a flow channel (210), each flow channel (210) having one or more partition ribs (300) inside, the partition ribs (300) being able to divide the flow channel (210) into multiple heat exchange zones.

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